Though determined to stay retired from the counter-espionage agency known as ICE, Matt Helm (Dean Martin) is tapped by MacDonald, his former boss, to find a hijacked American spacecraft that, in the wrong hands, could be used to control the world. Just the kind of "wrong hands" MacDonald and his superiors feared, Jose Ortega (Albert Salmi) and his Acapulco beer-brewing associate, Quintana, will stop at nothing short of global domination. So, armed with a collection of state-of-the-art secret weapons, Helm leaves behind an incredible bachelor apartment and a very private secretary, Lovely Kravezit, for the Mexican Riviera.